• pallavi marathe

Voice is considered to be a unique biometric property of human being. Unlike other biometric evidences for example fingerprints and retina scans etc., voice can be easily disguised. Present paper talks about how inhalation of Helium and Sulfur Hexafluoride (SF6) gas affects the resonant frequencies of the vocal tract. As Helium gas has low density, voice travels with the higher speed in it than that of the air, shifting resonant formant frequencies upper to the normal range. In SF6 gas, voice travels with lower speed than that of air due to its higher density results in lowering the resonant formant frequencies. Spectrographic analysis is presented with the help of PRAAT software.

Helium, Sulfur Hexafluoride, Formant frequencies, Voice disguise

"Effect of Helium and Sulfur Hexafluoride gas inhalation on voice resonances ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 6, page no.661-663, June-2020, Available :http://www.jetir.org/papers/JETIR2006089.pdf

"Effect of Helium and Sulfur Hexafluoride gas inhalation on voice resonances ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 6, page no. pp661-663, June-2020, Available at : http://www.jetir.org/papers/JETIR2006089.pdf